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Sulphurous Sea

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BiomeBannerSulphurousSea.png

The Sulphurous Sea, also known as the Sulphur Sea, is a biome added by the Calamity Mod which spawns upon world creation. It replaces the Ocean on the Dungeon side, and is located on top of the Abyss. Its water is turquoise colored, and it contains a hole leading to the Abyss.

It is primarily composed of Sulphurous Sand that makes up multiple islands that generate at sea level, where Acidwood trees will grow when not covered by water. A series of caves composed of Sulphurous Sandstone and Hardened Sulphurous Sandstone will generate between the surface of the Beach and the Abyss, where Rusty Chests can be found. Coral, Seashells and Starfish also grow faster in this biome, and many new decorative objects such as Corroded Fossils and Pillars will generate in the Sulphuric Caves.

Dangerous Sulphuric Bubbles can generate above any Sulphuric Sand or Sandstone when they are covered by water. These bubbles can't hurt the player until they have reached their maximum size. They deal 20 damage and inflict Venom for 2 seconds. The water is also hazardous, inflicting Sulphuric Poisoning that grows more damaging the longer the player stays in it. Steam Geysers also generate on the Beach, and will fire steam at the player if they walk over them.

Acid Rain can start in this biome at any time after the Eye of Cthulhu has been defeated. Acid Rain will cause numerous new enemies to spawn throughout the game at multiple points of progression, many of which have new drops.

The Aquatic Scourge boss can spawn here naturally (but very rarely) or can be summoned here by using Seafood, and The Old Duke can be summoned here by using Bloodworms as bait when fishing.

Contents[edit | edit source]

Sulphurous Sea
Characters Unique Treasures Unique Drops
Aquatic ParasiteAquatic Parasite
Aquatic SeekerAquatic Seeker
Aquatic UrchinAquatic Urchin
Baby Flak CrabBaby Flak Crab(Critter)
Catfish (enemy)Catfish (enemy)
FlounderFlounder
GnasherGnasher
TrasherTrasher
MaulerMauler(Miniboss)

If Aquatic Scourge has been defeated:

Anthozoan CrabAnthozoan Crab
Belching CoralBelching Coral

If Polterghast has been defeated:

BloodwormBloodworm(Critter)

Bosses:

Aquatic ScourgeAquatic Scourge
The Old DukeThe Old Duke
From Rusty Chests:
Broken Water FilterBroken Water Filter
Effigy of DecayEffigy of Decay
Rusty Beacon PrototypeRusty Beacon Prototype
Rusty MedallionRusty Medallion

From Pots:

Sulphuric TreasureSulphuric Treasure

From Aquatic Urchin:

Urchin StingerUrchin Stinger

From Trasher:

Trash Can (pet)Trash Can (pet)

From Catfish (enemy) and Trasher:

Diving HelmetDiving Helmet

From Gnasher in Hardmode:

Turtle ShellTurtle Shell

From Trasher in Hardmode:

GatligatorGatligator

From Baby Flak Crabs caught with a Bug Net:

Geyser ShellGeyser Shell

From Mauler:

Shark FinShark Fin

From Anthozoan Crabs and Belching Corals:

Corroded FossilCorroded Fossil

From Belching Corals:

Belching SaxophoneBelching Saxophone

From Mauler after defeating Polterghast:

Sulphuric Acid CannonSulphuric Acid Cannon

From terrain:

Sulphurous SandSulphurous Sand
Sulphurous SandstoneSulphurous Sandstone
Hardened Sulphurous SandstoneHardened Sulphurous Sandstone
AcidwoodAcidwood
CoralCoral
StarfishStarfish
SeashellSeashell
Rusty ChestRusty Chest

From Fishing:

Abyssal CrateAbyssal Crate
Abyssal AmuletAbyssal Amulet
Alluring BaitAlluring Bait
Planty MushPlanty Mush
Pink Jellyfish (bait)Pink Jellyfish (bait)
Red SnapperRed Snapper
ShrimpShrimp
TroutTrout
TunaTuna

Fishing[edit | edit source]

When fishing in the Sulphurous Sea the player can catch Abyss related items, these depend on the player's fishing power, and are as follows:

  • Abyssal Crate - Can be caught with any fishing power.
  • Planty Mush - Can only be caught with 0 to 80 fishing power.
    • Planty Mush's coded requirement is actually 40 to 80. However, as this item replaces Junk catches in the Abyss, it is technically 0 to 80.
  • Alluring Bait - Can only be caught with 40 to 159 fishing power.
  • Abyssal Amulet - Can only be caught with 110 to 239 fishing power.

Notes[edit | edit source]

Map Background Sulphurous Sea.png
Map Background.
Microbial Cluster
Microbial Cluster.png
Statistics
TypeAquatic
EnvironmentSulphurous Sea
AI TypeMicrobial Cluster AI
Damage0
Max Life5
Defense0
KB Resist100%
  • The Sulphurskin Potion and Sulphurous armor will reduce the damage taken from the sulphuric water. The Effigy of Decay and the Aquatic Scourge Lore item will grant the player complete immunity to the sulphuric water.
  • Player-created Sulphurous Sea biomes are possible by placing more than 30 blocks of Sulphurous Sand, Sulphurous Sandstone, or Hardened Sulphurous Sandstone in an area.
  • The Sulphurous Sea biome is defined by world position rather than the blocks present, meaning that a Dungeon-side Ocean initially generated without Calamity installed will still be considered as a Sulphurous Sea, and contain all of its enemies and effects. An artificial Sulphurous Sea can also be created by using Sulphurous Sand.
  • For an unknown reason, the Sulphurous Sea can generate within another biome, resulting in no entrance to the Abyss.
  • The Suphurous Sea can also generate entirely underwater, making the biome much more dangerous.
  • Microbial Clusters can also be found in the Sulphurous Sea. They are passive, invulnerable NPCs that spawn at any point in the game. Their only purpose is to provide a source of light alongside the Sulphurous Vines in the area.

Tips[edit | edit source]

  • This area is very dangerous for early game players, as it houses many strong enemies, like the Mauler.

Trivia[edit | edit source]

  • The theme heard while in the Sulphurous Sea is wasteland, which was composed by the artist DM DOKURO.
    • If the Calamity Music add-on mod is disabled, the Desert's theme will play instead.
  • The turquoise coloration of the water is representative of real life volcanic sulphuric lakes.
  • Due to the urine-like coloration of the biome's water in previous versions of the mod, this biome has been known by the community as the "piss sea/ocean".

Lore[edit | edit source]

A festering shore, where waves hiss upon lapping the crumbling stone of the beach. This is the Sulphur Sea, where the air stings your eyes, and each breath is a labor. Centuries ago, this was an ordinary coast, where the sun glimmered across blue waters, and fish danced in the light. A paradise, yet to Yharim, a simple tool; nothing more than a tomb for disposal of the dead who were of no importance. The beginning of Yharim’s rule was unimaginably harsh, far worse than those who came before him. His first action upon taking the throne was to enforce control upon much of the surrounding kingdoms, cities, and capitals. He succeeded in it all. Any who resisted further had their people massacred, or captured to serve under inhumane conditions, where they often collapsed, or ended their own lives to escape a worse fate. Inevitably, the body count rose. This increased further until finally, given no other options to dispose of the bodies, Yharim turned to what is now the Sulphur Sea.

At first, it was but a gradual flow of corpses, only those of which could not be contained within the dungeon’s crypts. This continued for quite some time, until a threat soon arose from the spirits of the dead. A raging amalgamation of hatred and desires, which tore through any of the forces sent to dispose of the bodies into the dungeon; Yharim realized it would be unwise to feed more souls to the growing threat. Thus, he began to dispose of more corpses into the far ocean. The once crystal clear waters turned dark with the blood and entrails of many, choking life out of its waters. This process destroyed the delicate and precious ecosystem. Only the hardiest and most desperate of the creatures in its bay clung onto their last hopes, and soon had adapted to the toxic environment. As the years passed, the waters suffered only more offenses, serving further despicable purposes, such as the containment of Silva, or the dumping grounds for the runoff of Draedon’s experiments. At last, Yharim’s rule as a Tyrant had been solidified, allowing no resistance, or his anger was pacified. The flow of corpses was stemmed, and the cruel practice had ended. However, the damage was done. The sea was irreparably ruined, though now, centuries later, the only trace of the assault on the ecosystem is the stained beach, and poisoned water. Dangerous and toxic creatures swim within its murky waters, devouring any life which would stray into their presence. This is the Sulfurous Sea, a story and example of the extent of the Tyrant’s tragic rule.